SQL Exercise: Employees whose salary is greater than their managers

Last update on December 20 2024 11:59:51 (UTC/GMT +8 hours)

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54. From the following table, write a SQL query to identify employees whose salaries are higher than their managers' salaries. Return employee name, job name, manager ID, salary, manager name, manager's salary.

Sample table: employees

Pictorial Presentation:

Sample Solution:

SELECT w.emp_name,
       w.job_name,
       w.manager_id,
       w.salary,
       m.emp_name "Manager",
       m.emp_id,
       m.salary "Manager_Salary"
FROM employees w,
     employees m
WHERE w.manager_id = m.emp_id
  AND w.salary > m.salary;

Sample Output:

 emp_name | job_name | manager_id | salary  | Manager | emp_id | Manager_Salary
----------+----------+------------+---------+---------+--------+----------------
 SCARLET  | ANALYST  |      65646 | 3100.00 | JONAS   |  65646 |        2957.00
 FRANK    | ANALYST  |      65646 | 3100.00 | JONAS   |  65646 |        2957.00
(2 rows)

Explanation:

The given query in SQL that selects the employee name, job name, manager ID, salary, manager name aliased as "Manager", manager ID, and manager salary aliased as "Manager_Salary" for all employees from the employees table.

The query is using a self-join to combine data from the employees table with itself based on the manager_id column.

The WHERE clause filters those employees whose salary is greater than their manager's salary.

Practice Online

Sample Database: employee

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